This application allows you to securely transfer the information contained in a "Difficult Intubation" letter given to you by your health care provider to your smartphone by scanning the QR Code printed in the letter. The electronic copy of the letter transferred to your smartphone can then be shown to other health care professionals looking after you. It contains information about why you may have a difficult airway and what worked and did not work for placing the breathing tube into your windpipe. We recommend that you check the information on your smartphone with the letter to make sure all the information is the same.